DY Piston Ring Surface Treatment

DY piston ring surface treatment includes Chromium plating, Nitriding,
PCr(CrN), DTC(ta-C), PVD(CrN), DLC(ta-C). With the rapid improvement of modern
engine performance, in order to meet the development needs of high combustion
pressure, high output power and maintenance-free, Dongya has successfully
developed a DLC(Diamond Like Carbon) coating with low friction coefficient,
high hardness, high wear resistance and significant tensile cylinder
performance after years of professional research. It is currently the world's
leading piston ring surface treatment technology, which is recommended that
customers give priority to the choice of DLC coated ring group.
Coating Type Chromium plating(Cr) Nitriding(N) PCr（CrN） DTC
（ta-C）
Technological principle Hard chromium electroplating Gas nitriding
Physical vapor deposition physical vapor depositionMagnetic Filtered
Cathodic Vacuum Arc Deposition
Coating Hardness(HV) Above 800 Above 900 1200±300 1500～
3000
Coating thickness Above 0.05 Above 0.03 Above 0.001 Above
0.001
wear resistance ★ ★ ★★ ★★★
longevity ★ ★ ★★ ★★★

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